Decorative design for an automobile hood



FIG. 1 is a perspective view looking from the right front of decorative design for an automobile hood showing my new design;

FIG. 2 is perspective view looking from the left rear; and,

FIG. 3 is a top plan view.

The bottom view is omitted and not part of the claimed design. 

The ornamental design for a decorative design for an automobile hood, as shown and described. 